- Obituary (1867 Hits)
- Obscurity (3013 Hits)
- Officium Triste (1440 Hits)
- Omission (1314 Hits)
- Omnium Gatherum (210 Hits)
- Onheil (937 Hits)
- Onkel Tom Angelripper (987 Hits)
- Onslaught (1809 Hits)
- Oppressus (1590 Hits)
- Orae (1445 Hits)
- Orden Ogan (1517 Hits)
- Out For Blood (977 Hits)
- Outrage (JPN) (586 Hits)
- Overkill (1386 Hits)
- Ozzy Osbourne (1514 Hits)